Tempering-machine.



L. D. & A. P. SLADE.

TEMPERING MACHINE.

APPLICATION FILED JAN. 16. 1913.

1,126,307, Patented Jan. 26, 1915.

2 SHEETS-SHEET 1.

t: a H o E! n uemtow fl-szmle 11111022195 L. D. 81. A. P. SLADE.

TEMPERING MACHINE. APPLICATION FILED JAN.16. 1913 1,126,301. PatentedJan. 26, 1915.

1 MW MIME 26 (M1 f m a)! imi 33 rna mur op nion LEON 1D. SE AND ALTON l.SLAIDE, 01E ROCHESTER, N EW YORK, ASSIGNORS TO GLEASON WORKS, 015EUCSTER, NEW YORK, A CORPORATION OF- NEW YORK.

TEERING-MACHINE.

Specification of Letters Patent.

Patented Jan, 26, 19115..

To all whom it may concern;

Be it known that We, LEoN D. SLADn and ALTON P. SLADE, both of Rochesterin they county of Monroe and State of New York, have invented certainnew and useful linprovements in 'lempering l /lachines; and we do herebydeclare the following to be a dull, clear, and exact description of thesame, reference being had to the accompanying drawings, forming a partof this specification, and to the reference-numerals marked thereon.

The'invention relates to improvements in tempering machines, being.designed more particularly with reference to its use in connection withthe tempering of gear wheels and articles having generally a similarformation, and it has for its object to provide a machine of this typewhich will permit of tempering the metal after it has been heated forcase hardening, and at the same time prevent any irregularities thatwould otherwise be caused by the contraction oi the metal upon cooling.

Another object of the invention consists in providing a novelconstruction and arrangement of parts whereby the articles may bereadily positioned for ing. process, after thev are taken from thefurnace, the parts being so disposed as to enable the article to bepositioned and at the same time with great accuracy, so that when cooledit will be true in every respect and require no further pressing.

To these and other ends the invention consists in certain improvementsand coinbinations of parts, all as will be more fully described, thenovel features being pointed out in the claims at the end of thespecifics tion.

In the drawings: Figure l is a vertical sectional view of a machineconstructed in accordance'with a preferred embodiment of our invention;2 is an enlarged sectional view, showing portions of the upper and lowerdie members with a gear wheel positioned therebetween; Fig. 3 is a planview of the lower die member, with a gear in position thereon, and Fig.l is an enlarged vertical sectional view throu h the die members when inoperative relation, at

the limit of their downward movement.

Similar reference numerals throughout the several figures indicate thesame parts.

In the present embodiment of our inthe temperquickly,

vention, there is provided a frame embodying a base which comprises anouter wall 1 arranged in spaced relation to an inner wall 2 forming theoil reservoir 3. The base is formed at the top with an annular wall 4disposed in spaced relation surrounding the top of the reservoir 3 andattached to said wall t are standards 5 which support at their upperends the cylinder 6 for a purpose that will presently be described.

7 designates the upper die member which is adapted to engage a gearwheel or other article upon the lower die member, as will presently bedescribed, and is suitably attached to a head 8, the latter being linedupon a plunger or piston rod 9 which carries the piston 10 traveling inthe cylinder 6. The cylinder 6 is connected by means of the pipe ll asuitable source of fluid pressure for edecting downward movement of thepiston, and the weight of the upper die member and the parts connect-edthereto is counter-balanced by an annular weight 12 surrounding thecylinder 6 and connected .tothe head 8 by means of the cables 13 whichare guided by the pulleys the latter being mounted on the arms 15. it isdesirable to effect a slightly yielding engagement between the upper diemember and the article, and to this end the die member carries ayielding annular ring 16 which is disposed in a suitable recess, beingheld position by a series of bolts 17, while 18 are springs surroundingsaid bolts and serving to hold the ring against the article, and at thesame time permitting it to yield slightly when necessary. The upper diemember is cutaway to atlord recess which cc o'perates with thetoothed-face of gear, and is provided with the vertically entendingopenings is normally disposed just above the top of with the requiredpressure and yieldable to the head 8 by means of bolts 24.

ill

the reservoir 3, as shown Fig. 1, and is supported upon the top 26 ofthesleeve 27 which surrounds and is guided upon .the casing 28arrangedcentrally at the bottom of the oil comprises a base, anoverhanging shoulder "be engaged allaround at equal distances from thecenter.

33 which engages the article, as shown in Fig.4, and a cam surface 34 bywhich it is moved into engagement with the article. The gripping devicejust describedmay be formed by taking'a ring of the desired crosssectional contour and cutting it into the necessary number of segmentalportions, the lower die member being recessed or cut away at 35 toafiord a seat for thegrippers- 36 is a removable ring arranged in arecess in the lower die member and adapted to support tne gear wheel.For gears or other articles oi different sizes, different rings may besubstituted according to the height required.

in the operation of the machine, the article while heated, is placedupon the lower die member, resting upon the ring 36, in a mannersubstantially as shown in Fig.

I l. The upper die member is then lowered,

whereupon the lower end of the plunger 9 comes into engagement with themovable grippers 32, to center the article. They are then engaged by theconical expander 21, which causes the inner edge of the gear to pointswhich are The article is thus accurately centered upon the lower diemember just previous to the application of pressure. The parts-are soarranged that immediately following the-centering of the gear, the upperdie member is forced hard against the same, and upon further operation,both of the die members and the article are lowered into the oilreservoir, causing the oil to. spout upwardly'through the openings inthe die members and to come in contact with all portions of the articlebeing tempered. Upon cooling, certain amount of contraction in the metaltakes place, causing a change in the diameter of the article, and thisis taken up by the springs 22 which enable the expander 21 to slightlychange its position with relation to the expansible gripping device onthe lower die member, so that the grippers may follow the inner edge ofthe gear closely. By this means,

the articleis always centered and there is no chance for anyirregularities to occur, owing to changes in the metal upon cooling.

The downwardmovement of the sleeve 27 isrsisted by the annular weight 37which is connected with the sleeve by means of cables 38 passing overthe pulleys 39 which are suitably mounted on the standards 5. The weight37 is suiiiciently heavy to cause the die members to engage each otherwith con siderable pressure before they move down- 'wardly into the oilbath.

40 1s a pipe leading to the reservoir 3, through which oil may besupplied to maintain a' circulation, pipe connecting withthe passage 42which surrounds the upper end of the oil reservoir.

We claim as our invention: I

1. In combination with a die member adapted to engage an article, asecond die member for engaging the opposite, surface of said article,one of said die members including an expansible gripping-device forengagement with the article, element in. the other die member arrangedfor cooperation with the expansible gripping device to force the latterinto engagement with the article.

2. in combination with a lower die member'adapted to, move vertically,off an upper die member, means operating on the upper die'member forfirst bringing it into engagement with an article on the lower diemember and subsequently moving both die members together, an expansiblegripping device on the lower die member, and a yieldable element on theupper die member arranged to coiiperate with said expansible grippingdevice.

3. In combination with a lower die member adapted to move vertically andhaving a plurality of openings therein, of an oil reservoir in whichsaid die member moves,-

an upper die member having a series of ppenings therein and adapted tobe moved into engagement with an article on the lower and 41' is an overflow and a yieldable.

die member, means for imparting downward movement to the upper diemember, means connected to the lower die member for retarding itsdownward movement, and a yieldable element carried by the upper diemember and cooperating with an expansible gripping device on the lowerdie member.

l. lln combination with an oil reservoir, of a lower die member movablevertically wit in the reservoir and normally. positioned above the topthereof, an expansible grip ping device arranged on the lower diemember, an upper die member, a yieldable member carried by the upper diemember for cooperation with-the expansible gripping device, and meansfor moving said upper die member into engagement with an article on thelower die member, simultaneously enpanding said gripping]. device, andsubsemacho? tioned above the top thereof, a plurality of movablegrippers carried by the lower die member having inclined surfaces, anupper die member movable into engagement with an article on the lowerdie member, the up,- per die member carrying a vertically yieldableexpander adapted to engage said inclined surfaces on the grippers, and ayieldable ring mounted on the upper die member and surrounding saidexpander.

'7. In combination with a lower die member adapted to move verticallyand having a plurality oi openings therein, of an oil reservoir in whichsaid die member moves, an upper die member having a series of openingstherein and adapted to be moved into engagement with an article on thelower die member, means for imparting downward movement to the upper diemember, means connected to the lower die member for retarding itsdownward movement, an expansible gripping device on the lower diemember, and an element carried by the upper die member and cooperatingwith said expansible gripping device.

In combination with an oil reservoir, of

a lower die member movable vertically within the reservoir and normallypositioned above the top thereof, an expanslble gripping device arrangedon the lower die memher, an upper die member, means carried by the upperdie member for cooperation with the expansible gripping device,and'ineans for moving said upper die member into engagement with anarticle on the lower die member, simultaneously expanding said grippingdevice, and subsequently lowering both die members into the oilreservoir.

9. In combination with a lower die member having vertical movement, of aplurality of movable grippers carried thereby and provided withinclinedsurfaces, an upper die member movable into per die member includin anexpander adapted to engage said inclined surfaces of the grippers.

10. The combination with a die member for supporting an annular article,a second die member for engaging the opposite surface of said article,one of said die members including an expansible gripping device forengaging the inner edge of the article and an element on the other diemember cooperating with the expansible gripping device to forcethe'latter inner edgegof said article. l

11. The combination with a lower die member having vertical movement, ofan upper die. member arranged to be brought into engagement with anannular article positioned on the lower die member, one

said members including an expansible gripplng device for engaging theinner edge oi the annular article, an element on the other die membercooperaing with said expansible gripping device to force the latter intoengagement with said inner edge of the article, means for impartingdownward movement to the upper die member and means connected to thelower die member for resisting its downward movement.

LJEQN l). SLADE. ALTQN l SLADE,

Witnesses:

G. H. BRYAN, Mar Ewan.

into engagement with the engagement with I an article on the lowerdiemember, the up-

